"People have stayed in jobs their whole life despite the boredom. If you told your boss that you want an open work relationship how do you think he/she would take that?"
Um, that's called having multiple jobs. Lots and lots of people do that and their bosses are fine with it as long as it doesn't affect their work performance. This is by no means a perfect analogy, but if anything it speaks in favor of the possibility of having one main, primary relationship (full time job) and one or more casual flings or secondary relationships (consulting gigs or part-time weekend jobs). Geez, these people can't even insult a concept cogently.
Me, 30ish bi female, been doing solo poly for roughly 5 years. Gia, Clay, and Pike, my partners. Davis, ex/friend/"it's complicated." Eric, Gia's husband. Bee, Gia and Eric's toddler.